<div dir="ltr">The '78 dash has an "Accessory Switch" that can be added. I have a factory blanking plate over that switch right now. If I go with the dash switch, that is where it will go. I would like a light as well, but I prefer the correct look. <div><br></div><div>I will probably pull the lever off of my non-O/D and use it, at least initially. I will need to run the wires. If the wiring wasn't already a mess on this car from the PO, I would be more concerned about it being correct and using the shifter switch</div><div><br></div><div>(That and it is a CBB '78, so I am not that concerned apparently)<div><br></div><div>--</div><div>Andrew</div></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Mon, Nov 11, 2019 at 12:06 PM Max Heim via Mgs <<a href="mailto:mgs@autox.team.net">mgs@autox.team.net</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div style="overflow-wrap: break-word;">It just occurred to me that this may not be as easy on a later car. A metal-dash car already has the hole in the dash for the toggle switch. There is probably not a handy hole in the 78 dash, and the “vintage-style” chrome-bezel toggle switch would look out of place.<div><br></div><div>For a while I had a Radio Shack “glowing blue” toggle switch installed (to remind me to switch off the OD), which might look more in keeping with the plastic dash. I was a little dubious about it handling the load, but it held up fine. The solenoid doesn’t draw much. I don’t really think there is any reason to run a relay, or the vacuum switch — a simple ON/OFF in series with the lock-out switch on the transmission works fine.</div><div><br></div><div>I don’t understand how a momentary push button switch (Bert’s suggestion) would even work...</div><div><br></div><div><br><div>
<div style="color:rgb(0,0,0);letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px"><div style="color:rgb(0,0,0);letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px"><div style="margin:0px;font-size:13px">--</div><div style="margin:0px;font-size:13px;min-height:16px">Max Heim</div><div style="margin:0px;font-size:13px">'66 MGB</div></div></div>
</div><div><br></div><div><br></div>
<br><div><blockquote type="cite"><div>On Nov 11, 2019, at 9:32 AM, Max Heim via Mgs <<a href="mailto:mgs@autox.team.net" target="_blank">mgs@autox.team.net</a>> wrote:</div><br><div><div style="overflow-wrap: break-word;">Exactly. I have a 1977 vintage blue label OD transmission in my 66. I have a dash-mounted switch to the left of the steering column. The wiring couldn’t be simpler. No weird expensive parts. The straight (as opposed to crookneck) dash OD switch is cheap.<div><br></div><div>You might not think the dash switch is as convenient as the gear lever switch, but it is really pretty ergonomic. You can flick it with the side of your hand while it is still in contact with the wheel — you don't have to go groping for it.</div><div><br><div>
<div style="letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px"><div style="letter-spacing:normal;text-align:start;text-indent:0px;text-transform:none;white-space:normal;word-spacing:0px"><div style="margin:0px;font-size:13px">--</div><div style="margin:0px;font-size:13px;min-height:16px">Max Heim</div><div style="margin:0px;font-size:13px">'66 MGB</div></div></div>
</div>
<br><div><blockquote type="cite"><div>On Nov 11, 2019, at 8:08 AM, Charley Robinson via Mgs <<a href="mailto:mgs@autox.team.net" target="_blank">mgs@autox.team.net</a>> wrote:</div><br><div>
<div bgcolor="#FFFFFF">
I've swapped OD gearboxes into two CBBs. In both cases I used the
gear levers from the original non-OD transmissions. I don't see any
reason that you can't use the gear lever you already have for the OD
box. <br>
<br>
As to the OD switch, I'd put it on the dash if I had an open spot
for it that was handy to my right hand. In the CB cars the wiring
and switch are already installed but there's no reason you can't
find the white circuit that Paul mentioned and run a wire from it to
your switch and from the switch to the lockout switch on the OD
box. Looks like there are a couple of switches in the Moss catalog
that would look OK on the dash. The switch is just a SPST that can
handle the solenoid current.<br>
<br>
My $ .02,<br>
<br>
CR<br>
<br>
<div>On 11/11/2019 7:35 AM, Andrew Lundgren
via Mgs wrote:<br>
</div>
<blockquote type="cite">
<div dir="auto">I have a '78. The transmission is a blue label,
but the seller doesn't have the shift lever.
<div dir="auto"><br>
</div>
<div dir="auto">A lever for a '78 is not a cheap thing, and my
son who is driving it a lot right now likes the Walnut MG logo
shifter it has. So I'm looking at options for how to install
the O/D switch. </div>
<div dir="auto"><br>
</div>
<div dir="auto">From the moss catalog, it looks like the '76
switch won't work with the '78. So I might have to buy the
parts to put together the shifter switch or put it in the
blank accessory switch above the fan on the dash. </div>
<div dir="auto"><br>
</div>
<div dir="auto"><br>
</div>
</div>
<br>
<div class="gmail_quote">
<div dir="ltr" class="gmail_attr">On Mon, Nov 11, 2019, 1:45 AM
PaulHunt73 <<a href="mailto:paulhunt73@virginmedia.com" target="_blank">paulhunt73@virginmedia.com</a>>
wrote:<br>
</div>
<blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div bgcolor="#ffffff">
<div><font size="2">None of that is to do with the OD
itself.</font></div>
<div> </div>
<div><font size="2">Which gears it operated on is a function
of the linkages on top of the gearbox, and you can have
it on 3 and 4 or 4 only as you wish. When the TCSA was
introduced in late 76 to control 'surging' a third
switch was added to the top of the gearbox that operated
in 2nd and 4th, and this was wired in series with the OD
switch operating in 3rd and 4th to produce a 4th gear
only output controlling the TCSA and vacuum advance. I
suspect that was not very reliable as it was an external
micro-switch so it was deleted and the gearbox
components changed so the switch operated in 4th
only, as done to the V8 several years previously. The
gearbox switch now controlled both OD and TCSA. </font></div>
<div> </div>
<div><font size="2">The gear lever itself changed for the 77
model year to incorporate the OD manual switch, but that
can also be fitted to any year, or the 77 converted back
to some other switch, as you wish.</font></div>
<div> </div>
<div><font size="2">The wiring prior to 77 was from the
manual switch on the dash or the column, to the gearbox
switch on a yellow and a yellow red, then from there to
the solenoid. For 77 on it was from the ignition supply
on a white to the gearbox switch, then from there to the
manual switch on the gear lever, and from there to the
solenoid.</font></div>
<div> </div>
<div><font size="2">Black label or blue label determines
which speedo is compatible - black label was used on CB
cars and used a 1280tpm speedo. Blue label was used on
RB cars and used a 1000tpm speedo. But speedos can be
recalibrated if you end up with the wrong combination. </font></div>
<div> </div>
<div><font size="2">So as a 78 it should have a blue label
OD and the manual switch on the gear lever, as the
column switch - which together with the plastic dash was
new for the 77 model year - won't have that function.
But if the car has the earlier RB dash and column
switches you don't need the gear lever switch, which is
prone to shorting out and causing harness damage.</font></div>
<div> </div>
<div><font size="2">PaulH.</font></div>
<div> </div>
<blockquote style="border-left:2px solid rgb(0,0,0);padding-left:5px;padding-right:0px;margin-left:5px;margin-right:0px">
<div style="font:10pt arial">----- Original Message -----
</div>
<div dir="auto">Not so much. It will be a a bit still
until the transmission arrives. (Freight from NY to UT)
I'm just trying to figure out which shifter it should
have had as well as which gears it should work on.
<div dir="auto"><br>
</div>
<div dir="auto">I'm going to be putting it into a 78,
but the current owner is still trying to track down
the shifter from his friend, the previous owner. He
doesn't know if it was a late shifter or an early one.</div>
<div dir="auto"><br>
</div>
<div dir="auto">I'm trying to determine how to wire it
in.</div>
</div>
</blockquote>
</div>
</blockquote>
</div>
<br>
<fieldset></fieldset>
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